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A kind of isobutane dehydrogenation catalyst and preparation method thereof

A dehydrogenation catalyst and isobutane technology, applied in the direction of catalyst carrier, chemical instrument and method, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of deep dehydrogenation and cracking of isobutane, mechanical strength and Unsatisfactory high temperature stability, platinum dispersion, particle size distribution and surface morphology are not easy to control, etc.

Active Publication Date: 2017-09-29
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are also some shortcomings, such as the dispersion degree, particle size distribution and surface morphology of platinum on the carrier are not easy to control, the γ-Al used 2 o 3 The strong acidity of the carrier can easily cause side reactions such as deep dehydrogenation and cracking of isobutane; various modified carriers can improve the conversion rate and selectivity of the reaction to a certain extent, but their mechanical strength and high temperature stability are still not enough Ideal and other issues

Method used

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  • A kind of isobutane dehydrogenation catalyst and preparation method thereof
  • A kind of isobutane dehydrogenation catalyst and preparation method thereof
  • A kind of isobutane dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Embodiment 1: Preparation of isobutane dehydrogenation catalyst

[0089] The implementation steps of this embodiment are as follows:

[0090] A. Catalyst carrier preparation

[0091] According to NH 4 VO 3 , Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 The mass ratio of O is 19:60:2, and NH 4 VO 3 Dissolved in saturated oxalic acid solution to obtain ammonium metavanadate solution; Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water, and then added 4% ethylene glycol dispersant based on the total equivalent of metal ions to obtain a solution with a total equivalent concentration of iron and aluminum metal ions of 0.1 mol / L;

[0092] The above two solutions were slowly added to the deionized water in parallel, and then the precipitant was slowly added dropwise until it was in the form of a sol, and then transferred to an autoclave for 12 hours at a temperature of 200 ° C, and then heated to a pressure of 3.0MPa, and maintained at this p...

Embodiment 2

[0101] Embodiment 2: Preparation of isobutane dehydrogenation catalyst

[0102] The implementation steps of this embodiment are as follows:

[0103] A. Catalyst carrier preparation

[0104] According to NH 4 VO 3 , Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 The mass ratio of O is 23:50:5, and NH 4 VO 3 Dissolved in saturated oxalic acid solution to obtain ammonium metavanadate solution; Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 O is dissolved in deionized water, and then added with 1% ethanol dispersant based on the total equivalent of metal ions to obtain a solution with a total equivalent concentration of iron and aluminum metal ions of 0.5 mol / L;

[0105] The above two solutions were slowly added to the deionized water in parallel, and then the precipitant was slowly added dropwise until it was in the form of a sol, and then transferred to an autoclave for 24 hours at a temperature of 160°C, and then heated to a pressure of 2.0MPa, and maintained at this pressur...

Embodiment 3

[0114] Embodiment 3: Preparation of isobutane dehydrogenation catalyst

[0115] The implementation steps of this embodiment are as follows:

[0116] A. Catalyst carrier preparation

[0117] According to NH 4 VO 3 , Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 The mass ratio of O is 20:55:3, and NH 4 VO 3 Dissolved in saturated oxalic acid solution to obtain ammonium metavanadate solution; Al(NO 3 ) 3 9H 2 O and Fe(NO 3 ) 3 9H 2 O was dissolved in deionized water, and then added 2.5% isopropanol dispersant based on the total equivalent of metal ions to obtain a solution with a total equivalent concentration of iron and aluminum metal ions of 0.3 mol / L;

[0118] The above two solutions were slowly added to the deionized water in parallel, and then the precipitant was slowly added dropwise until it was in the form of a sol, and then transferred to an autoclave for 18 hours at a temperature of 180°C, and then heated up to a pressure of 2.5MPa, and maintained at this pr...

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Abstract

The invention relates to an iso-butane dehydrogenation catalyst and a preparation method thereof. The preparation method comprises steps as follows; a saturated oxalic acid solution containing dissolved ammonium metavanadate and a ferro-aluminum nitrate mixed solution are mixed in a parallel flow manner, the mixture is precipitated through a precipitant, a catalyst carrier precursor is prepared with a hydrothermal and fluid drying method, the carrier precursor is modified with an impregnation auxiliary, active components are impregnated, and the catalyst is prepared through drying, calculation and forming. The catalyst has high catalytic activity, has higher iso-butane conversion rate, iso-butane selectivity and iso-butane yield and has low requirements for purity of raw materials.

Description

【Technical field】 [0001] The invention belongs to the technical field of producing olefins by dehydrogenating low-carbon alkanes. More specifically, the present invention relates to an isobutane dehydrogenation catalyst, and also relates to a preparation method of the isobutane dehydrogenation catalyst. 【Background technique】 [0002] Isobutene is one of the scarce resources in my country at present, and it is an important raw material for the production of chemicals such as polyisobutene (PIB), MTBE, alkylation of light olefins, mixed light olefins (light gasoline), butyl rubber and plexiglass. The fine chemical industry that uses isobutene as a resource develops rapidly, and the demand grows rapidly. The catalytic dehydrogenation of isobutane to produce isobutene has become one of the main methods to solve the shortage of isobutene. [0003] There are two main types of catalysts used for isobutane dehydrogenation: one is based on the noble metal platinum, and the other is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J32/00B01J23/847
CPCB01J23/002B01J23/8472B01J23/898B01J2523/00B01J2523/31B01J2523/13B01J2523/17B01J2523/842B01J2523/43B01J2523/3712
Inventor 高超李速延左满宏王鹏刘恩莉徐敏燕
Owner XIAN ORIGIN CHEM TECH
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